Foreigners have again become the targets of kidnappers in Iraq.

Iraqi officials in Balad, north of Baghdad, say six Iranian pilgrims were abducted Monday. They say two women were released Tuesday, but the fate of the remaining four pilgrims is still not clear.

They were the second group of Shi'ite pilgrims targeted Monday. Three British pilgrims were killed during a bus ambush south of the capital.

Meanwhile, Germany has called for the immediate release of one of its missing nationals. Archaeologist Susanne Osthoff and her driver disappeared Friday.

The aid group, Christian Peacemaker Teams, confirms that four of its employees - said to be an American, a Briton and two Canadians - were kidnapped in Baghdad Saturday.

Elsewhere, the U.S. military reports that a roadside bomb blast killed two American soldiers north of Baghdad today.

Some information for this report provided by AFP and Reuters.